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三國時期，呂蒙是吳國有名的大將軍，因為家裡很窮，沒有辦法讓他唸書，所以，常常被人笑說吳國的呂蒙只不過是會打仗而已，其實也沒多了不起。為了這句玩笑話，他一直非常生氣。

有一天，吳國的君主孫權嚴肅地說：「你現在已經是吳國的大將軍，擁有很高的權力，如果只有一身武功是不夠的，還希望你可以多讀點書。」剛開始，呂蒙還說自己太忙，想要推掉孫權的要求，最後受到孫權的鼓勵，奮發圖強。後來，當他和魯肅一起討論軍事的時候，魯肅不免覺得呂蒙已經有了很大的改變，跟過去完全不同。呂蒙聽到魯肅的話，也高興地說：「只要過了三天，人也是會變的，應該要用不一樣的眼光看待啊！」

To Look At Someone With New Eyes

Lu Meng was a general of the kingdom of Wu during the Three kingdoms Period. His family was poor and had no money to send him to school, so instead the drilled very techniques, and in the end, became a general.

One time, Emperor Sun Chiuan told Lu Meng that both Emperor Guang Wu of the Han dynasty and Tsau Tsau of kingdom of Wei were very learned people, and suggested that he, too, being a high-level government official, ought to find some time to study.

From then on, Lu Meng put all his efforts into studying, and he soon became extremely knowledgeable. The minister Lu Su came to him one day to discuss military affairs, and was greatly surprised to discover that the general's theories and ideas were brilliant. He said to Lu Meng, "I never thought you would become as learned as you are today. you're not the same person you were before!" Lu Meng laughed and said, "You need only be separated from a person for three days, and you will see him with new eyes!"

Today, when a person does something that causes others to see him differently, we can say that people "look at him with new eyes."